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David Tomasko

  • Professor, Chemical & Biomolecular Eng
  • Assc Dean, Undergrad Edc & Srv, COE Undergrad Educ/Std Svcs
  • 486 CBEC
    151 W. Woodruff Ave.
    Columbus, OH 43210
  • 614-247-6548

About


Education

  • B.S., University of Tulsa, 1986
  • M.S., University of Illinois, 1990
  • Ph.D., University of Illinois, 1992

 

Key Honors and Distinctions

  • OSU Alumni Award for Distinguished Teaching, 2002

 

RESEARCH AREAS - Tomasko Lab for Thermodynamics, Separations, and Materials Processing
  • Thermodynamics, Separations, and Materials Processing.
  • All graduate student research positions are currently filled. 
  • PUBLICATIONS

The theme of my research is to promote the use of environmentally benign solvents in chemical and materials processing. Our current focus is the application of supercritical fluids (SCFs) to separations and the processing of polymers, foods, and pharmaceuticals. As shown schematically below, these fluids lie somewhere between gases and liquids and have very desirable transport and thermodynamic properties for infusing/ extracting organics into/from complex matrices. The necessary tools in this work include phase equilibrium thermodynamics, mass transport in compressible fluids, physical organic chemistry, and spectroscopic analysis. 

Research opportunities in separations are numerous and provide an excellent area in which to bring together many disciplines, including chemical engineering, civil engineering, and industrial chemistry. Our goal in this area is to develop new technologies for the difficult separations encountered in environmental clean-up and isomer purification. 

SCFs can dissolve into and swell polymeric matrices as efficiently as liquid organic swelling agents with the advantage that they are easier to separate from the polymer after processing. This has the effect of reducing the Tg and melt viscosity of the polymer and allows us to incorporate additives into polymers using a supercritical fluid as a carrier. We can, for example, change the color, wettability, or density of a polymer by swelling and impregnating with an SCF solvent. We can also dramatically alter the polymer blending process in an extruder. This area involves mass transport and thermodynamics of highly asymmetric, complex molecular systems and incorporates both experimental and computational components. 

Finally, SCFs are applied to separating and crystallizing thermally labile compounds, such as foods and pharmaceuticals. In this work, we are interested in all aspects of pharmaceutical crystallization with emphasis on using supercritical fluid solvents as the crystallizing medium. Techniques include rapid expansion of supercritical solutions in which expansion through a capillary sets up a standing shock wave to initiate nucleation from the expanded gas, and gas antisolvent crystallization where the SCF is used as an antisolvent to precipitate particles out of a liquid solution. This work includes projects in nucleation and growth, phase equilibrium, and thermodynamic modeling of pharmaceutical solubility.

 

Honors

  • 2010

    Commencement Speaker, 394th Commencement of The Ohio State University. The Ohio State University.

  • 2010

    Faculty Diversity Excellence Award. .

  • 2008

    Lumley Engineering Research Award. .

  • 2005

    Exemplary Service Award. .

  • 2004

    Charles E. MacQuigg Award for Outstanding Teaching. .

  • 2004

    Ralph L. Boyer Award for Outstanding Teaching. .

  • 2003

    Lumley Engineering Research Award. .

  • 2002

    Lumley Award for Interdisciplinary Research. .

  • 2002

    Alumni Award for Distinguished Teaching.

  • 1999

    Charles E. MacQuigg Award for Outstanding Teaching. .

  • 1998

    Maro Publications Future Technology Award for special achievement in research of future developments in the field of polymers. .

  • 1998

    Best Paper Award. .

  • 1998

    Lumley Engineering Research Award. .

  • 1992

    NSF Post-doctoral Grant. .

  • 1988-1989

    Amoco Foundation Fellowship.

  • 1987-1988

    General Electric Fellowship.

  • 1986-1987

    Union Carbide Fellowship.

  • 1986

    W.L. Nelson Award for Outstanding Achievement in Chemical Engineering. University of Tulsa.

  • 1985

    Tau Beta Pi.

Presentations

  • "Adsorption of and from Supercritical Carbon Dioxide on Microporous Materials." 2000,
  • "Bioactive polymer surfaces via supercritical fluids." 2002,
  • "Novel Polymer/Clay Nanocomposite Foams Synthesized by Supercritical CO2." 2003,
  • "Supercritical Fluid Processing for Functional Biomaterials." 2005,
  • "Supercritical Fluid Assisted Polymer Blending." 1998,
  • "Adsorption Behavior of Supercritical Carbon Dioxide on Microporous Materials." 2000,
  • "Supercritical Fluid Applications in Polymer Processing." 2000,
  • "Spectroscopic Characterization of Supercritical Fluid Impregnation of Polymers." 2000,
  • "Supercritical Fluid Assisted Polymer Processing: Novel Blends and Foams." 2001,
  • "Supercritical carbon dioxide foaming and impregnation of polymers." 2002,
  • "Foam Extrusion of Polystyrene and its Nanocomposites Using Supercritical CO2." 2002,
  • "Carbon Dioxide Assisted Processing of Polymer Nanocomposites." 2004,
  • "Rotational Rheometry of Polymers under Carbon Dioxide." 2006,
  • "Materials Processing with Supercritical Fluids I: Processing in the Solid Phase." 1997,
  • "Lab-on-a-chip Design-Build Project in a First-Year Engineering Course." 2006,
  • "Gluing Nanopatterned Polymers with CO2: Reversible Surface Tg Reduction of Polymers." 2006,
  • "Applications of Supercritical Fluids - Just how much can we do with pure CO2?." 1994,
  • "Solute-Solute Effects in Supercritical Fluid Processing of Biomolecules." 1995,
  • "Supercritical Technology for Impregnation of Synthetic Materials." 1996,
  • "Applications of Supercritical Fluids to Materials Processing." 1996,
  • "Investigation of the influence of injecting pressurized CO2 on the hot melt extrusion process and the extrudate properties of Eudragit E100." 2004,
  • "Engaging Engineering Students." 2004,
  • "Carbon Dioxide Effects on Surface Tg and Implications for Processing." 2004,
  • "Rotational rheometry of polymers under high pressure carbon dioxide."
  • "Rheological Studies of Polymers Under High Pressure CO2." 2005,
  • "Supercritical Fluid Processing for Functional Biomaterials: Some Medical Applications." 2005,
  • "CO2-Assisted Surface Modification of Polymers with Antibodies Based on Surface Tg Reduction." 2005,
  • "CO2-induced Plasticization and Viscosity Reduction in Pharmaceutical Polymers." 2005,
  • "CO2-Induced Plasticization and Viscosity Reduction in Pharmaceutical Polymers." 2005,
  • "Rheological Changes in CO2 Impregnated Polymers Reinforced with Nanoclays." 2003,
  • "The Role of Interfacial Tension in CO2 Assisted Polymer Extrusion Process." 2003,
  • "Extrusion of Polystyrene Foams Reinforced with Nano-Clays." 2003,
  • "Gas Enhanced Interfacial Bonding of Polymers at the Micro/Nanoscale." 2003,
  • "Analysis of morphology development in the CO2 - assisted polymer blending process." 2003,
  • "High-pressure adsorption of CO2 on NaY zeolite and model prediction of adsorption isotherms.."
  • "Investigation of Polymer Surface Dynamics under CO2." 2004,
  • "Biologically Benign Three-Dimensional Assembly of Polymer Structures at the Nanoscale Using CO2." 2004,
  • "CO2 as a Blowing Agent in Polymer Nanocomposite Foams." 2004,
  • "Investigation of Polymer Surface Dynamics under CO2 using Atomic Force Microscopy." 2004,
  • "Phase Behavior and Tg in CO2 – Polymer Systems." 2004,
  • "Adsorption Behavior of Supercritical Carbon Dioxide on Microporous Materials." 2002,
  • "Structure of nanocomposite foams." 2002,
  • "Processing and cell structure of nano-clay modified microcellular foams." 2002,
  • "Influences of solubility and viscosity in the polystyrene/CO2 microcellular foaming extrusion." 2002,
  • "Polymer/Clay Nanocomposite Foams Prepared by CO2." 2003,
  • "Understanding and Exploiting Tg Reduction for Surface and Bulk Modification of Polymers with CO2." 2005,
  • "Dynamics of Nanocomposite Foams using Carbon Dioxide." 2006,
  • "Foaming Using a Polystyrene / Poly(methyl methacrylate) Blend and Nanocomposites." 2006,
  • "Density Functional Approach for Modelling Polymer-CO2 Interfaces." 2006,
  • "Role of CO2 in Surface Tg Reduction of Polymers." 2006,
  • "CO2 and Drug-Induced Plasticization and Viscosity Reduction in Pharmaceutical Polymers." 2006,
  • "Environmentally Benign Crystallization: Compressed Fluids as Separable and Recoverable Antisolvents." 1997,
  • "Supercritical Fluid Processing of Pharmaceuticals." 1998,
  • "Supercritical Fluid Applications in Polymer Processing." 1999,
  • "Adsorption Behavior of Supercritical Fluids on Microporous Materials." 2000,
  • "Supercritical Fluid Applications in Polymeric Materials Processing." 2000,
  • "Piggybacking Chemotherapeutic Function onto Biomedical Implants via Carbon Dioxide Treatment." 2005,
  • "“Supercritical Fluid Applications in Polymeric Materials Processing." 2000,
  • "Environmental Applications of Supercritical Fluids." 1994,
  • "The role of CO2 in Enhancing Polymer Extrusion." 2003,
  • "CO2 as a Blowing Agent in Nanocomposite Systems – Thermodynamics and Rheology - Polymer-Supercritical Fluid Systems and Foams." 2003,
  • "Investigation of the influence of injecting pressurized CO2 on the hot melt extrusion process and the extrudate properties of PVP-VA 64." 2004,
  • "Investigation of the influence of injecting pressurized CO2 on the hot melt extrusion process and the extrudate properties of itraconazole with PVP-VA 64." 2005,
  • "Interfacial Tension between Polystyrene (PS) and SC CO2." 2002,
  • "Thermodynamic and Glass Transition Behavior in CO2 – Polymer Systems Emphasizing the Surface Region." 2006,
  • "Polymer Scaffolds foamed with CO2 for Tissue Engineering Applications." 2002,
  • "Interfacial Tension of Polystyrene/CO2 Systems." 2002,
  • "Low-temperature fusion of polymeric nanostructures using carbon dioxide."
  • "Applications of Supercritical Fluids to Materials Processing." 1997,
  • "Carbon Dioxide-Enhanced Polymer Compounding - Supercritical Fluids in Materials Processing and Synthesis." 1999,
  • "Carbon Dioxide-Enhanced Polymer Compounding." 1999,
  • "Microfabricated Polymer Blends for the Study of CO2 Foaming." 2004,
  • "Gluing Nanopatterned Polymers with CO2: Reversible Surface Tg Reduction of Polymers." 2007,
  • "A Novel Fabrication Technique for Polymeric Lab-on-a-chip Devices Containing an Immobilized Enzyme." 2008,

Papers in Proceedings

2008

  • "Comparison of carbon nanofibers and nanoclay on rheology of polystyrene under supercritical carbon dioxide." (9 2008).
  • "Comparison of Carbon Nanofibers and Activated Carbon on Carbon Dioxide Foaming of Polystyrene." in 65th Annual Technical Conference of the Society-of-Plastics-Engineers. (11 2008).

2007

  • "Foaming dynamics of immiscible polymer blends." (9 2007).
  • Guo Z., Lee, L.J. and Tomasko, D.L. "CO2 and Water Vapor Permeability in Polymer Nanocomposites and Foams." in Proceedings of SPE ANTEC. (1 2007). 3109-3114 - 3109-3114.
  • "Density functional approach for modeling polymer-CO2 interfaces." (12 2007).

2006

  • "Electronic course portfolios for peer-evaluation of teaching." (12 2006).
  • Kalish, A., Tomasko, D.L., Masty, J., Acker, S., Rudmann, S., Forbush, J. "Electronic Course Portfolios for Peer-Evaluation of Teaching." in Proceedings of ASEE Annual Conference. (1 2006). Paper 2309 - Paper 2309.
  • "Polymer nanocomposite foams prepared by supercritical fluid foaming technology." (12 2006).
  • Allam, Y., Tomasko, D.L., Merrill, J., Trott, B., Schlosser, P., Clingan, P. "Lab-on-a-chip Design-Build Project with a Nanotechnology Component in a Freshman Engineering Course." in Proceedings of ASEE Annual Conference. (1 2006). Paper 2326 - Paper 2326.
  • Liu, D., Yang, Y., Kusaka, I., Tomasko, D.L., Lee, L.J. "Role of CO2 in Surface Tg Reduction of Polymers." in Proceedings of the 8th International Symposium on Supercritical Fluids. (1 2006).
  • "Lab-on-a-chip design-build project with a nanotechnology component in a freshman engineering course." (12 2006).
  • Clingan, P., Tomasko, D.L., Merrill, J., Allam, Y. "Work in Progress: Micro-/Nano-Technology ‘Lab-on-a-chip’ Research Project for First-Year Honors Engineering Program." in 36th Annual Frontiers in Education Conference. (1 2006).
  • Wingert, M.J., Guo, Z., Shen, J., Lee, L.J., Tomasko, D.L., Koelling, K.W. "Dynamics of Nanocomposite Foams using Carbon Dioxide." in Proceedings of the 8th International Symposium on Supercritical Fluids. (1 2006).

2005

  • "Work in progress - 'Lab-on-a-chip' micromanufacturing with a nanotechnology component for a first-year engineering program: Implementation results." (12 2005).
  • Tomasko, D.L., Liu, D., Yang, Y., Lee, L.J., Lannutti, J.J., Verreck, G., Arien, T., Brewster, M. "Understanding and Exploiting Tg Reduction for Surface and Bulk Modification of Polymers with CO2." in Proceedings of 10th European Meeting on Supercritical Fluids. (12 2005).
  • Allam, Y., Tomasko, D.L., Merrill, J., Stevenson, P., Yang, Y., Wilson, T. "Lab-on-a-chip’ Micromanufacturing with a Nanotechnology Component for a First-Year Engineering Program: Implementation Results." in 35th Annual Frontiers in Education Conference. (1 2005).
  • "Rheological studies of polymers under high pressure carbon dioxide." (12 2005).
  • "CO2-induced surface Tg reduction of polymer and theoretical modeling." (12 2005).
  • Tomasko, D.L., Koelling, K.W., Lee, L.J., Han, X., Zeng, C., Wingert, M.J., Liu, D. "Polymer Nanocomposite Foams: Effect of Clay Surface Modification on Foam Structure." in NSF Grantees Conference. (1 2005).

2004

  • Yang, Y., Liu, D., Lee, L.J., Tomasko, D.L. "Investigation of Polymer Surface Dynamics under CO2 using Atomic Force Microscopy." in Proceedings of 20th Annual Meeting of the Polymer Processing Society – PPS-20. (1 2004).
  • Tomasko, D.L., Merrill, J., Stevenson, P., Schofield, T., Yang, Y., Allam, Y., Brand, S. "Work in Progress – ‘Lab-on-a-chip’ Micromanufacturing with a Nanotechnology Component for a First-Year Engineering Program." in Proceedings of 34th Annual Frontiers in Education Conference. (1 2004).
  • Han, X., Zeng, C., Wingert, M.J., Liu, D., Koelling, K.W., Lee, L.J., Tomasko, D.L. "Polymer Nanocomposite Foams: Effect of Clay Surface Modification on Foam Structure." in Proceedings of 27th Australasian Polymer Symposium. (1 2004).
  • "Effect of clay surface modification on the polymer nanocomposite foam structure." (6 2004).
  • Liu, D., Li, H., Wingert, M.J., Koelling, K.W., Lee, L.J., Tomasko, D.L. "Polymer Nanocomposite Foams Prepared by Environmentally Benign Carbon Dioxide." in NSF Grantees Conference. (1 2004).
  • "Bioactive polymer surfaces via supercritical fluids." (3 2004).
  • Verreck, G., Li., H., Ariën, A., Peeters, J., Tomasko, D., Van den Mooter, G., Brewster, M. "Investigation of the influence of injecting pressurized CO2 on the hot melt extrusion process and the extrudate properties of PVP-VA 64." in Proceedings of 8th Meeting on Supercritical Fluids. (1 2004).

2003

  • "Rheological changes in Co2 impregnated polystyrene reinforced with nanoclays." (10 2003).
  • "Extrusion of polystyrene foams reinforced with nano-clays." (1 2003).
  • "Polymer/clay nanocomposite foams prepared by CO2." (10 2003).
  • Li, H., Han, X., Wingert, M.J., Lee, L.J., Koelling, K.W., Tomasko, D.L. "The Role of CO2 in Enhancing Polymer Extrusion Processes." in Proceedings of the 6th International Symposium on Supercritical Fluids. (1 2003).
  • Tomasko, D.L., Koelling, K.W., Lee, L.J., Han, X., Zeng, C., Li "CO2 as a Blowing Agent in Nanocomposite Systems – Thermodynamics and Rheology." in Polymer-Supercritical Fluid Systems and Foams. (12 2003).

2002

  • Han, X., Zeng, C., Lee, L.J., Tomasko, D.L., Koelling, K.W. "Polymer Nanocomposite Foams by Using Supercritical CO2." in Proceedings of 18th Annual Meeting of the Polymer Processing Society – PPS-18. (1 2002).
  • Zeng, C., Han, X., Lee, L.J., Koelling, K.W., Tomasko, D.L. "Structure of nanocomposite foams." in Proceedings of SPE-ANTEC. (1 2002). 1504-1508 - 1504-1508.
  • Tomasko, D.L., and Lee, L.J. "Phase Inversion in sCO2 Enhanced Polymer Blending." in NSF Grantees Conference. (1 2002).
  • Han, X., Baxter, A.R., Koelling, K.W., Tomasko, D.L., Lee, L.J. "Influences of solubility and viscosity in the polystyrene/CO2 microcellular foaming extrusion." in Proceedings of SPE-ANTEC. (1 2002). 1910-1914 - 1910-1914.
  • Han, X., Zeng, C., Lee, L.J., Koelling, K.W., Tomasko, D.L. "Processing and cell structure of nano-clay modified microcellular foams." in Proceedings of SPE-ANTEC. (1 2002). 1915-1919 - 1915-1919.

2001

  • Han, X., Koelling, K.W., Tomasko, D.L., Lee, L.J. "Process Optimization in Microcellular Foam Extrusion." in Proceedings of SPE-ANTEC. (1 2001). 1741-1745 - 1741-1745.
  • Elkovitch, M., Lee, L.J., Tomasko, D.L "Supercritical Carbon Dioxide Assisted Polymer Blending in Twin-Screw Extrusion: Phase Inversion, Morphology, and Mechanical Properties." in Proceedings of SPE-ANTEC. (1 2001). 2338-2343 - 2338-2343.

2000

  • Humayun, R., Tomasko, D.L, Brueggemeier, S.B. "Adsorption of and from Supercritical Carbon Dioxide on Microporous Materials." in Proceedings of the 5th International Symposium on Supercritical Fluids. (4 2000).
  • Kim, J., Tomasko, D.L., Ruan, S., Lannutti, J., Mariotti, A., Rumpf, D. "Supercritical Processing of Synthetic Biomaterials." in Proceedings of the 5th International Symposium on Supercritical Fluids. (4 2000).
  • "Supercritical carbon dioxide assisted polymer blending in twin-screw extrusion: Relations between morphology evolution and mechanical properties." in 58th Annual Technical Conference of the Society-of-Plastics-Engineers. (1 2000).
  • Tomasko, D.L., Elkovtich, M.D., Lee, L.J. "Supercritical Carbon Dioxide Assisted Polymer Blending in Twin Screw Extrusion: Relations Between Morphology Evolution and Mechanical Properties." in Proceedings of the 5th International Symposium on Supercritical Fluids. (4 2000).
  • Tomasko, D.L., Wang, Y., Yang, C. "Supercritical Fluid Impregnation of Surfactant-Like Probes into Polypropylene and Poly(methyl methacrylate) Films." in Proceedings of the 5th International Symposium on Supercritical Fluids. (4 2000).
  • "Extrusion of polystyrene microcellular foam with supercritical CO2." in 58th Annual Technical Conference of the Society-of-Plastics-Engineers. (1 2000).

1999

  • "Morphology development in carbon dioxide assisted polymer blending in batch and continuous processes." in 57th Annual Technical Conference of the SPE on Plastics Bridging the Millennia (ANTEC 99). (1 1999).

1998

  • "Viscosity reduction of polymers by the addition of supercritical carbon dioxide in polymer processing." in 56th Annual Technical Conference of the Society-of-Plastics-Engineers - Plastics on My Mind (ANTEC 98). (1 1998).
  • "Supercritical fluid assisted polymer blending." in 56th Annual Technical Conference of the Society-of-Plastics-Engineers - Plastics on My Mind (ANTEC 98). (1 1998).

1997

  • Chou, Y.-H., Tomasko, D.L. "GAS Crystallization of Polymer-Pharmaceutical Composite Particles." in Proceedings of 4th International Symposium on Supercritical Fluids. (1 1997).

1994

  • Bakshi, B.R., Koelling, K.W., Tomasko, D.L. "Chemical Engineering - Moving forward in traditional process engineering and emerging technologies." in Engineering Horizons. (1 1994). 18 - 18.